In the settings pop-up the simulation time frame can be specified. Start is the first analysis hour - Stop is the last. A year has 0 - 8760 hours.

The simulation steps check-boxes allow you to deactivate certain modules. “Files” writes out sensor point data and illuminance files. This is mainly for validation purposes. The “Rtrace” controls the DAYSIM simulation. “Rtrace” can be skipped when you re-run a simulation and you have not changed any geometry. “Impulse” controls the light-solver.

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In Short

Umi is a Rhino-based design environment for architects and urban planners interested in modeling the environmental performance of neighborhoods and cities with respect to operational and embodied energy use, walkability and daylighting potential. Since 2012, Umi has been  developed by the Sustainable Design Lab at the Massachusetts Institute of Technology with support from a National Science Foundation EFRI_SEED project, the MIT Energy Initiative, the Kuwait-MIT Center, the Center for Complex Engineering Systems (CCES) at KACST and MIT, Transsolar Climate Engineering and United Technologies Corporation. Further tool developed is now also being conducted at the Environmental Systems Lab at Cornell University.

A first public version of Umi was released during a public symposium on Sustainable Urban Design on May 6th 2013 at the Massachusetts Institute of Technology. Version 2.0, which also includes an embodied energy module, was released on November 7th 2014.

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